HAPPY 247th BIRTHDAY TO THE UNITED STATES OF AMERICA…!

Still the greatest country that will ever be…!

Apollo 15 astronaut James Irwin salutes the stars and stripes, August 2, 1971.  Note the fine cross-hatches that appear at measured distances in the photo.  They’re due to the Réseau plate that was installed at the film plane inside the Hasselblad cameras the astronauts used on the moon’s surface.  Beside helping to detect distortion in the image, they provided a reference for distance and the size of objects in the field of view.
7.4.2023

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